POST UTME LEAD CITY UNIVERSITY 2022 Biology | Objective

Practice these randomly selected questions to test your readiness.

Question 1
A study on the effect of antibiotics on bacterial growth found that the growth rate of the bacteria is 0.5 cm/h. What is the expected time for the bacteria to reach a population of 1000?
A. 10 hours
B. 20 hours
C. 30 hours
D. 40 hours
Question 2
A geneticist is studying the inheri\tance of a particular trait in a population of fruit flies. The trait is controlled by a \single gene with two alleles: A and a. The genotype and phenotype of the offspring are as follows:
A. AA
B. Aa
C. aa
D. Both AA and aa
Question 3
A diagram of a human kidney is shown below. What is the function of the nephron?
A. Filtering waste and excess fluids from the blood.
B. Regulating the body's electrolyte balance.
C. Supporting the kidney's structure.
D. Producing hormones that stimulate red blood cell production.
Question 4
The process of excretion in humans involves the removal of waste products from the body. Which of the following organs is responsible for filtering waste from the blood?
A. Liver
B. Kidneys
C. Lungs
D. Skin
Question 5
A population of rabbits is growing according to the \logistic growth model. If the initial population size is 100 and the carrying capacity is 1000, what is the population size after 5 generations?
A. 500
B. 750
C. 900
D. 950
Question 6
A 45-year-old man presents with a 5-year history of progressive weakness and wasting of the proximal muscles. Physical examination reveals a characteristic 'honeycomb' appearance of the muscles. Which of the following is the most likely diagnosis?
A. Duchenne muscular dystrophy
B. Becker muscular dystrophy
C. Myotonic dystrophy
D. Spinal muscular atrophy
Question 7
The organ system responsible for the regulation of body temperature is the nervous system. Which of the following structures within the nervous system is responsible for detecting changes in body temperature?
A. Hypothalamus
B. Thalamus
C. Cerebellum
D. Pons
Question 8
The sense organ responsible for detecting changes in light intensity is the?
A. Eye
B. Ear
C. Nose
D. Tongue
Question 9
A diagram of a human heart is shown below. What is the function of the atrioventricular (AV) node?
A. Regulating the heart rate.
B. Relaying signals from the atria to the ventricles.
C. Supporting the heart's structure.
D. Detecting changes in blood pressure.
Question 10
A genetic engineer is designing a new gene therapy to treat a particular disease. The gene therapy involves the use of a viral vector to deliver a specific gene to the target cells. Which of the following is a potential advantage of u\sing a viral vector?
A. Increased specificity of gene delivery
B. Increased efficiency of gene delivery
C. Decreased risk of off-target effects
D. Increased risk of immune response
Question 11
A diagram of the respiratory system shows the following components: A → B → C → D. If the air enters the lungs at node A, what is the order of the components that will be involved in gas exchange?
A. A → B → C → D
B. A → C → B → D
C. B → A → C → D
D. C → A → B → D
Question 12
The process of genetic variation in a population is influenced by several factors, including mutation, genetic drift, and gene flow. Which of the following is an example of a mutation that can lead to genetic variation?
A. Point mutation
B. Frameshift mutation
C. Gene duplication
D. Gene deletion
Question 13
A diagram of the nervous system shows the following connections: A → B → C → D. If the stimulus is applied to node A, what is the order of the neurons that will be activated?
A. A → B → C → D
B. A → C → B → D
C. B → A → C → D
D. C → A → B → D
Question 14
The equation for the rate of photosynthesis is given by the light-dep\endent reactions. What is the unit of the rate of photosynthesis?
A. mol/m^2/s
B. mol/m^3/s
C. m^2/s
D. s^-1
Question 15
The diagram below shows the structure of a neuron. What is the function of the d\endrites?
A. To transmit signals to other neurons
B. To receive signals from other neurons
C. To store information
D. To produce neurotransmitters

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